Kissing an infection-free partner is good for your teeth!
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When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
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In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
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Raj from the Big Bang Theory is married to Miss India.
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The single biggest predictor of love is proximity.
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In Finland, Valentine's Day is called "Ystävänpäivä" which translates into "Friend's day".
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Approximately 141 million Valentine's Day cards are exchanged worldwide every year.
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You burn 26 calories in a one minute kiss.
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